Humans have created ways to make strong structures while saving on the amount of materials used. Below are some forms that are used during construction to create strong structures that resist forces. What are some other ways we can make structures strong? This information will be VERY useful to you in your upcoming labs!

Using Strong Shapes:

http://www.pbs.org/wgbh/buildingbig/educator/act_straw_ho.html

Building with I-Beams:

http://www.wisegeek.org/what-is-a-steel-i-beam.htm

Using Columns:

http://www.grook.net/forum/civil-engineering/construction/type-of-columns-concrete-columns

http://www.teachersdomain.org/asset/phy03_vid_zcolumnsiii/

http://www.teachersdomain.org/asset/phy03_vid_zcolumnsii/

Strong Trusses:

http://wiki.answers.com/Q/How_do_trusses_work


http://www.google.ca/url?sa=t&rct=j&q=how%20to%20trusses%20work&source=web&cd=3&ved=0CD8QFjAC&url=http%3A%2F%2Fwww.trussme.com.au%2Fresources%2FTrusses%2520how%2520do%2520they%2520work.pdf&ei=HUgsUaqiGMXriwLd1YHgCQ&usg=AFQjCNF_HCDQcUdu_qRQ8_FpckptHkRAaQ

Building with Arches:

http://answers.yahoo.com/question/index?qid=20090110093439AAr2iuW


http://www.teachersdomain.org/asset/phy03_vid_bbhooverdam/

Research other ways to make structures strong...

Activity: Put the events below in order. Dramatize a skit to help tell the

story of events.

1. The bridge structure experiences structural stress.
2. A freight train loaded with iron ore passes over the bridge.
3. The bridge collapses.
4. The beams of the rail bridge bend slowly.
5. The rail bridge carries 10 trains a day over the valley.
6. The beams of the rail bridge give way.
7. The bridge is experiencing structural fatigue.
8. A rail bridge was built here 30 years ago.
9. The bridge is experiencing structural failure.




The Three Little Pigs Reinforce their homes to withstand forces:



Designing a Safe Roller Coaster:
http://www.learner.org/interactives/parkphysics/coaster/section1.html


Designs to resist forces from earthquake:

Material Stress, Fatigue and Failure:

Do materials get tired?

http://www.teachersdomain.org/asset/psu06-nano_vid_intro/
http://www.teachersdomain.org/asset/psu06-nano_vid_fatigue/

The Paper Chair Challenge:

http://www.teachersdomain.org/asset/phy03_vid_znewschair/

http://www.youtube.com/watch?v=ZGkEuNMj4po